Hi folks,
This patch adds additional P4/Xeon extended error reporting in the
form of register dumping.
Regards,
Zwane Mwaikambo
Against 2.5.14-dj2
--- linux-2.5.14-dj/arch/i386/kernel/bluesmoke.c.orig Sat May 11 12:09:58 2002
+++ linux-2.5.14-dj/arch/i386/kernel/bluesmoke.c Sat May 11 13:38:17 2002
@@ -18,8 +18,24 @@
#ifdef CONFIG_X86_MCE
+/* as supported by the P4/Xeon family */
+struct intel_mce_extended_msrs {
+ u32 eax;
+ u32 ebx;
+ u32 ecx;
+ u32 edx;
+ u32 esi;
+ u32 edi;
+ u32 ebp;
+ u32 esp;
+ u32 eflags;
+ u32 eip;
+ /* u32 *reserved[]; */
+};
+
static int mce_disabled __initdata = 0;
+static int mce_num_extended_msrs = 0;
static int banks;
@@ -116,6 +132,33 @@
#endif /* CONFIG_X86_MCE_P4THERMAL */
+/* P4/Xeon Extended MCE MSR retrieval, return 0 if unsupported */
+
+static int inline intel_get_extended_msrs(struct intel_mce_extended_msrs *r)
+{
+ u32 h;
+
+ if (mce_num_extended_msrs == 0)
+ goto done;
+
+ rdmsr(MSR_IA32_MCG_EAX, r->eax, h);
+ rdmsr(MSR_IA32_MCG_EBX, r->ebx, h);
+ rdmsr(MSR_IA32_MCG_ECX, r->ecx, h);
+ rdmsr(MSR_IA32_MCG_EDX, r->edx, h);
+ rdmsr(MSR_IA32_MCG_ESI, r->esi, h);
+ rdmsr(MSR_IA32_MCG_EDI, r->edi, h);
+ rdmsr(MSR_IA32_MCG_EBP, r->ebp, h);
+ rdmsr(MSR_IA32_MCG_ESP, r->esp, h);
+ rdmsr(MSR_IA32_MCG_EFLAGS, r->eflags, h);
+ rdmsr(MSR_IA32_MCG_EIP, r->eip, h);
+
+ /* can we rely on kmalloc to do a dynamic
+ * allocation for the reserved registers?
+ */
+done:
+ return mce_num_extended_msrs;
+}
+
/*
* Machine Check Handler For PII/PIII
*/
@@ -126,6 +169,7 @@
u32 alow, ahigh, high, low;
u32 mcgstl, mcgsth;
int i;
+ struct intel_mce_extended_msrs dbg;
rdmsr(MSR_IA32_MCG_STATUS, mcgstl, mcgsth);
if(mcgstl&(1<<0)) /* Recoverable ? */
@@ -133,6 +177,15 @@
printk(KERN_EMERG "CPU %d: Machine Check Exception: %08x%08x\n", smp_processor_id(), mcgsth, mcgstl);
+ if (intel_get_extended_msrs(&dbg)) {
+ printk(KERN_DEBUG "CPU %d: EIP: %08x EFLAGS: %08x\n",
+ smp_processor_id(), dbg.eip, dbg.eflags);
+ printk(KERN_DEBUG "\teax: %08x ebx: %08x ecx: %08x edx: %08x\n",
+ dbg.eax, dbg.ebx, dbg.ecx, dbg.edx);
+ printk(KERN_DEBUG "\tesi: %08x edi: %08x ebp: %08x esp: %08x\n",
+ dbg.esi, dbg.edi, dbg.ebp, dbg.esp);
+ }
+
for (i=0;i<banks;i++) {
rdmsr(MSR_IA32_MC0_STATUS+i*4,low, high);
if(high&(1<<31)) {
@@ -334,11 +387,24 @@
set_in_cr4(X86_CR4_MCE);
printk(KERN_INFO "Intel machine check reporting enabled on CPU#%d.\n", smp_processor_id());
+ /*
+ * Check for P4/Xeon specific MCE extensions
+ */
+
+ if (c->x86_vendor == X86_VENDOR_INTEL && c->x86 == 15) {
+ /* Check for P4/Xeon extended MCE MSRs */
+ rdmsr(MSR_IA32_MCG_CAP, l, h);
+ if (l & (1<<9)) {/* MCG_EXT_P */
+ mce_num_extended_msrs = (l >> 16) & 0xff;
+ printk(KERN_INFO "CPU#%d: Intel P4/Xeon Extended MCE MSRs (%d) available\n",
+ smp_processor_id(), mce_num_extended_msrs);
+ }
+
#ifdef CONFIG_X86_MCE_P4THERMAL
- /* Only enable thermal throttling warning on Pentium 4. */
- if (c->x86_vendor == X86_VENDOR_INTEL && c->x86 == 15)
+ /* Check for P4/Xeon Thermal monitor */
intel_init_thermal(c);
#endif
+ }
done=1;
}
--- linux-2.5.14-dj/include/asm-i386/msr.h.orig Sat May 11 12:45:19 2002
+++ linux-2.5.14-dj/include/asm-i386/msr.h Sat May 11 12:47:54 2002
@@ -57,8 +57,21 @@
#define MSR_IA32_MCG_STATUS 0x17a
#define MSR_IA32_MCG_CTL 0x17b
-#define MSR_P6_EVNTSEL0 0x186
-#define MSR_P6_EVNTSEL1 0x187
+/* P4/Xeon+ specific */
+#define MSR_IA32_MCG_EAX 0x180
+#define MSR_IA32_MCG_EBX 0x181
+#define MSR_IA32_MCG_ECX 0x182
+#define MSR_IA32_MCG_EDX 0x183
+#define MSR_IA32_MCG_ESI 0x184
+#define MSR_IA32_MCG_EDI 0x185
+#define MSR_IA32_MCG_EBP 0x186
+#define MSR_IA32_MCG_ESP 0x187
+#define MSR_IA32_MCG_EFLAGS 0x188
+#define MSR_IA32_MCG_EIP 0x189
+#define MSR_IA32_MCG_RESERVED 0x18A
+
+#define MSR_P6_EVNTSEL0 0x186
+#define MSR_P6_EVNTSEL1 0x187
#define MSR_IA32_THERM_CONTROL 0x19a
#define MSR_IA32_THERM_INTERRUPT 0x19b
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This archive was generated by hypermail 2b29 : Tue May 14 2002 - 12:00:16 EST